CN209738692U

CN209738692U - Wheel pair, bogie and rail vehicle

Info

Publication number: CN209738692U
Application number: CN201822144603.5U
Authority: CN
Inventors: 赵锋; 秦成伟; 鲍明全
Original assignee: CRRC Tangshan Co Ltd
Current assignee: CRRC Tangshan Co Ltd
Priority date: 2018-12-20
Filing date: 2018-12-20
Publication date: 2019-12-06
Anticipated expiration: 2028-12-20

Abstract

the embodiment of the application provides a wheel pair, bogie and rail vehicle, wherein, the wheel pair includes: an axle; wheels symmetrically disposed on the axle; the axle box is connected with the axle through a bearing; a cushion ring disposed between the bearing and the axle housing. The wheel pair, the bogie and the rail vehicle provided by the embodiment of the application are beneficial to reducing the self weight of the vehicle body of the rail vehicle.

Description

Wheel pair, bogie and rail vehicle

Technical Field

The application relates to a vehicle running technology, in particular to a wheel pair, a bogie and a rail vehicle.

Background

The rail vehicle is an important traffic tie connecting cities, is gradually a main vehicle in the cities, and is also a main carrier for realizing goods transportation. The rail vehicle mainly includes: the bogie is used for bearing the vehicle body and realizing walking and steering functions.

The bogie generally comprises: the wheel set comprises an axle, wheels and an axle box, the two wheels are symmetrically and fixedly arranged on the axle, two ends of the axle are respectively connected with the axle box through bearings, the axle box is connected with the framework through a primary suspension and positioning device, and the framework is connected with a vehicle body through a secondary suspension and traction device. The frame is the core skeleton of bogie, and traditional frame comprises two parallel arrangement's curb girder and the crossbeam of connecting between two curb girders, and two curb girders and crossbeam connect into "H" shape. The side beam is large in size, two ends of the side beam extend to the upper portion of the axle box along the longitudinal direction, and the primary suspension is arranged between the side beam and the axle box along the vertical direction. The side beam with larger volume also has larger weight, thereby increasing the weight of the bogie.

Disclosure of Invention

The embodiment of the application provides a wheel pair, bogie and rail vehicle, is favorable to alleviateing rail vehicle automobile body dead weight.

An embodiment of the first aspect of the present application provides a wheel pair, including:

an axle;

wheels symmetrically disposed on the axle;

the axle box is connected with the axle through a bearing;

A cushion ring disposed between the bearing and the axle housing.

In the wheel pair as described above, the primary cushion ring includes:

an outer ring;

An inner ring positioned within the outer ring; and the number of the first and second groups,

An intermediate ring located between the outer ring and the inner ring.

In the wheel set as described above, the intermediate ring is a rubber ring.

In the wheel set as described above, the outer ring is a metal ring; the inner ring is a metal ring; the middle ring is connected with the inner ring and the outer ring through a vulcanization process.

In the wheel pair, the inner ring is in clearance fit with the bearing, and the outer ring is in interference fit with the axle box.

The wheel pair, the axle is a hollow shaft;

The wheel pair further comprises: a shaft end cover; is connected to the end of the axle.

In the wheel pair, the wheels are in interference fit with the axle.

The wheel pair as described above, further comprising: and a brake disc disposed on the axle.

An embodiment of the second aspect of the present application provides a bogie, including: wheel pairs as described above.

An embodiment of a third aspect of the present application provides a rail vehicle, including: a bogie as described above.

According to the technical scheme provided by the embodiment of the application, wheels and axle boxes are arranged on an axle, and the axle boxes are connected with the axle through bearings; a series of buffer rings are arranged between the bearing and the axle box and used for buffering the vibration between the bearing and the axle box, so that the vibration of the wheel is reduced and transmitted to the axle box, and the vibration transmitted to the vehicle body through the framework is also reduced.

In the conventional bogie, the end of the side member extends above the axle box and is connected to the axle box by a suspension, so that the side member needs to be sized to meet the requirements of a suspension assembly, resulting in a large size and weight of the side member. In the wheel pair provided by the embodiment, the bearing and the axle box are provided with the buffer ring, so that the function of primary suspension in the traditional bogie can be realized, and the axle box is directly connected with the framework, so that the volume of the connecting beam can be smaller, the supporting strength of a vehicle body can be met, the weight of the connecting beam is far smaller than that of a side beam of the traditional bogie, the weight of the bogie is reduced, and the self weight of a railway vehicle is reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a schematic structural diagram of a bogie to which a wheel set can be applied according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a wheel pair provided in the first embodiment of the present application;

FIG. 3 is an exploded view of a wheel set provided in accordance with an embodiment of the present application;

FIG. 4 is a partial cross-sectional view of a wheel set provided in accordance with an embodiment of the present application;

FIG. 5 is a schematic structural diagram of an axle housing according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of a buffer ring according to an embodiment of the present disclosure;

FIG. 7 is a schematic view of a series of cushion rings assembled in an axle housing according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a framework provided in an embodiment of the present application;

FIG. 9 is a schematic structural diagram of a frame and wheelset assembly provided in accordance with an embodiment of the present disclosure;

FIG. 10 is an exploded view of the frame and wheelset assembly provided in accordance with an embodiment of the present application;

FIG. 11 is an exploded view of a truck according to one embodiment of the present application;

FIG. 12 is an exploded view of a draft gear according to an embodiment of the present application;

fig. 13 is a schematic structural diagram of a bogie provided with a driving motor according to a first embodiment of the present application;

Fig. 14 is an exploded view of a drive motor and wheel set provided in accordance with an embodiment of the present disclosure;

Fig. 15 is a schematic view of an assembly of a driving motor and a wheel set provided in the first embodiment of the present application.

reference numerals:

1-a cross beam; 11-a tie rod connection; 111-a second pivot hole; 12-a brake lifting seat; 13-motor connecting seat; 14-a traction groove; 15-a secondary mount;

2-connecting the beams; 21-a linker arm; 211 — a first bolt hole; 22-a connector; 221-a first pivot; 222-a support base; 23-a bolt; 24-a nut;

31-axle; 32-a wheel; 33-axle boxes; 331-a first connection; 3311-a first pivot hole; 332-a second connection; 3321-third pivot hole; 34-a buffer ring; 341-outer ring; 342-an intermediate ring; 343-inner ring; 35-a bearing; 36-shaft end cap; 37-a brake disc;

4-positioning the pull rod; 41-a second pivot; 42-a third pivot; 43-abdication through holes;

5-braking the clamp;

6-a traction device; 61-center pin; 62-pulling the rubber pile; 621-a receiving hole; 63-pressing plate;

7-an air spring;

8-driving a motor; 81-motor housing; 811-a connecting socket; 82-a stator; 83-a rotor; 84-connecting rod.

Detailed Description

In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following further detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings makes it clear that the described embodiments are only a part of the embodiments of the present application, and are not exhaustive of all embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

Example one

The embodiment provides a wheel pair which can be applied to a bogie of a railway vehicle. The rail vehicle can be a diesel locomotive, an electric locomotive, a motor train unit, a subway, a light rail, a tramcar and the like. The bogie has light dead weight, so that the dead weight of a vehicle body can be reduced, and the traction efficiency is improved.

fig. 1 is a schematic structural diagram of a bogie to which a wheel set provided in an embodiment of the present application can be applied. As shown in fig. 1, the bogie includes: frame and wheel pair, wherein, the frame includes: a cross beam 1 extending in the transverse direction and a connecting beam 2 extending in the longitudinal direction, the connecting beam 2 being connected to the cross beam 1. The transverse direction is the left-right direction of the rail vehicle, and the longitudinal direction is the traveling direction of the rail vehicle. The vertical direction mentioned later is a vertical direction, that is, an up-down direction.

fig. 2 is a schematic structural diagram of a wheel set provided in the first embodiment of the present application, and fig. 3 is an exploded view of the wheel set provided in the first embodiment of the present application. As shown in fig. 1 to 3, the wheel pair comprises: an axle 31, wheels 32, and axle boxes 33. Wherein the axle 31 extends in the transverse direction, namely: the axis of the axle 31 is parallel to the cross member 1. Two wheels 32 are symmetrically provided on one axle 31. The axle is also provided with an axle box 33, and the axle box 33 is connected to the axle 31 via a bearing so that the axle 31 can rotate relative to the axle box 33.

In the prior art, the axle boxes are limited to be connected with the frame through a series of suspensions, and the axle boxes can be arranged on the outer side of the wheels. With the above-described configuration provided in the present embodiment, the axle boxes 33 may be disposed on the outer sides of the wheels 32, or may be disposed on the inner sides of the wheels 32. The following describes in detail how the wheel set is realized, taking as an example the case where the axle boxes 33 are provided inside the wheels 32. The axle boxes 33 are located on the inner side of the wheels 32, namely: between the two wheels 32. The outer wall of the axle box 33 is connected to the connecting beam 2.

Fig. 4 is a partial cross-sectional view of a wheel set provided in accordance with an embodiment of the present application. As shown in fig. 4, the wheel set further comprises: a cushion ring 34 is provided between the bearing and the axle box 33, and is used for cushioning vibration between the bearing and the axle box 33 and preventing vibration of the wheel 32 from being transmitted to the axle box 33 through the axle 21 and the bearing.

According to the technical scheme provided by the embodiment, wheels and axle boxes are arranged on an axle, and the axle boxes are connected with the axle through bearings; a series of buffer rings are arranged between the bearing and the axle box and used for buffering the vibration between the bearing and the axle box, so that the vibration of the wheel is reduced and transmitted to the axle box, and the vibration transmitted to the vehicle body through the framework is also reduced.

The function of the buffer ring 34 is to buffer the vibration between the bearing and the axle box 33, and the structure thereof can be implemented in various ways, and the embodiment provides a specific scheme:

fig. 5 is a schematic structural diagram of an axle box according to a first embodiment of the present disclosure, fig. 6 is a schematic structural diagram of a series of cushion rings according to the first embodiment of the present disclosure, and fig. 7 is a schematic structural diagram of a series of cushion rings assembled in an axle box according to the first embodiment of the present disclosure. As shown in fig. 5 to 7, a series of buffer rings 34 includes: an outer ring 341, an intermediate ring 342 and an inner ring 343 arranged in this order from the outside to the inside. The outer ring 341 may be made of metal, the inner ring 343 may also be made of metal, and the intermediate ring 342 is made of a material having certain elasticity, for example: the rubber ring is made of rubber. The outer ring 341, the intermediate ring 342 and the inner ring 343 may be manufactured through a vulcanization process. The rubber ring has high internal resistance and can absorb impact and high-frequency vibration to reduce noise.

Compared with a rigid linear spring which can only bear load in a single direction and is adopted in the primary suspension in the related art, the primary buffer ring 34 adopted in the embodiment can bear multi-directional load, and a good buffer effect can be achieved by only adopting the primary buffer ring 34, so that the number of parts is reduced, and the structure of the bogie is simplified.

As shown in fig. 4, the outer ring 341 is in interference fit with the axle housing 33, and the inner ring 343 is in clearance fit with the outer ring of the bearing 35. The inner race of the bearing 35 is in interference fit with the axle 31.

The wheels 32 are in interference fit with the axle 31. The axle 31 can be a hollow shaft, which is beneficial to reducing the weight of the wheel pair. The axle cover 36 is provided on the outer side of the wheel 32, the axle cover 36 is fixed to the end of the axle 31 by bolts, and the axle cover 36 can provide a sealing effect for the hollow axle 31 and prevent foreign materials such as dust from entering the hollow cavity of the axle 31.

In the case where the axle boxes 33 are disposed outside the wheels 32, the axle boxes 33 are disposed outside the wheels 32. The axle boxes 33 and the wheels 32 are mounted on the axle 31 in a manner that can be achieved by incorporating the axle boxes 33 as described above.

in addition to the above technical solution, a connection portion may be provided on an outer wall of the axle box 33 for connecting with the frame. The present embodiment further optimizes the structure of the axle box 33 and the frame:

Fig. 8 is a schematic structural diagram of a frame provided in the first embodiment of the present application, fig. 9 is a schematic structural diagram of an assembly of the frame and a wheel set provided in the first embodiment of the present application, and fig. 10 is an exploded view of the assembly of the frame and the wheel set provided in the first embodiment of the present application. As shown in fig. 8 to 10, the number of the connection beams 2 is at least two, and at least two connection beams 2 are symmetrically disposed on both sides of the cross member 1 in the longitudinal direction. The connecting beam 2 has two ends, called: a first end and a second end.

The axle housing 33 has a first connecting portion 331 formed on an outer wall thereof, and the first connecting portion 331 has a vertical height higher than an axis of the axle housing 33.

The first end of the connecting beam 2 is connected with the cross beam 1, and the second end is connected with the first connecting part 331 on the axle box 33, so that the connection between the cross beam 1 and the wheel set is realized. The weight of the vehicle body is applied to the cross member 1, and is transmitted to the axle boxes 33 via the connecting beams 2 and then to the wheels 32 via the axles 31.

further, the connecting beam 2 is of a long strip structure, and can be of a linear type or a certain radian. The tie-beam 2 can produce certain deformation in vertical direction, plays bow spring's effect, and the vibration of wheel pair cushions, reduces the vibration of automobile body. The connecting beam 2 has the advantages of small volume, light weight, simple structure and easy production and assembly.

Four connecting beams 2 are arranged on the bogie shown in fig. 1, two connecting beams 2 are symmetrically arranged on one side of the cross beam 1, and the other two connecting beams 2 are symmetrically arranged on the other side of the cross beam 1. Correspondingly, two axle boxes 33 are symmetrically arranged on each axle 31, and the axle boxes 33 are connected with the corresponding connecting beams 2. The weight of the vehicle body is evenly distributed on the four wheels 32, so that the force applied to the rail by each wheel 32 is kept stable, the riding comfort can be improved, and the phenomenon of 'wheel weight load shedding' that the vertical load transferred from the wheels 32 to the rail is reduced when the vehicle runs on a curved rail or a rail with an irregular track can be inhibited, and the vehicle is not easy to derail.

Two ends of the connecting beam 2 are respectively fixedly connected with the cross beam 1 and the axle box 33; or, two ends of the connecting beam 2 are respectively pivoted with the cross beam 1 and the axle box 33; or the first end of the connecting beam 2 is fixedly connected with the axle box 33, and the second end is pivoted with the cross beam 1; or, the first end of the connecting beam 2 is fixedly connected with the cross beam 1, and the second end is pivoted with the axle box 33.

in fig. 9, the wheels 32 are removed to clearly show the manner in which the axleboxes 33 are connected to the connecting beam 2. As shown in fig. 9, in the present embodiment, the first end of the connecting beam 2 is fixedly connected to the cross beam 1, and the second end is pivotally connected to the axle box 33, so that the axle box 33 can rotate a certain angle relative to the connecting beam 2. When the cross beam 1 is subjected to variable load, relative rotation can be generated between the cross beam and the axle boxes 33, so that the stress of the four wheels 32 is balanced.

The embodiment provides a specific implementation manner of the connection beam 2:

As shown in fig. 8 to 10, the connection beam 2 includes: connecting arm 21 and connecting piece 22. Wherein, one end of the connecting arm 21 is fixedly connected with the cross beam 1, and the other end is connected with the connecting piece 22. The link 22 is pivotally connected to the first connection 331 of the axle housing 33.

As for the connection manner between the connection arm 21 and the connection member 22, there are various means such as: a receiving space for receiving the connecting arm 21 is provided in the connecting piece 22, which is open toward the connecting arm 21. The connecting arm 21 can be inserted into the receiving cavity and is fixedly connected with the connecting piece 22. Specifically, the first bolt holes 211 are provided in the connecting arm 21, and the number of the first bolt holes 211 may be two or more. A second bolt hole (not marked in the figure) is correspondingly formed in the side wall of the accommodating cavity. The connecting arm 21 is inserted into the receiving hole so that the first bolt hole 211 and the second bolt hole are aligned, and fixed by a bolt 23 passing through the first bolt hole 211 and the second bolt hole and fitting a nut 24.

alternatively, the connection structure of the connecting arm 21 and the connecting member 22 may be interchanged, that is: a receiving cavity is provided on the connecting arm 21, and the connecting member 22 is inserted into the receiving cavity of the connecting arm 21 for connection.

Besides the above-mentioned methods, the connecting arm 21 and the connecting member 22 can be fixed by clamping, welding, riveting, etc.

For the implementation of the pivot connection between the connecting element 22 and the axle housing 33, various means can be used, for example the following:

The first connecting portion 331 is formed with a first pivot hole 3311, and a center line of the first pivot hole 3311 is parallel to a center line of the axle box 33. The end of the connecting member 22 is provided with a pivot portion including: two supporting seats 222 and a first pivot 221 connected between the two supporting seats 222. The first pivot 221 can be fitted in the first pivot hole 3311 to connect the connecting member 22 to the first connecting portion 331, and the connecting member 22 can rotate relative to the first connecting portion 331.

Besides the above solutions, a pivot may be disposed on the first connection portion 331, and a pivot hole is disposed on the connection member 22 correspondingly, so as to realize the pivotal connection between the connection member 22 and the first connection portion 331.

In addition to the above-described implementation, the connection beam 2 can also be implemented in other ways, such as: the connecting beam 2 is an integral beam, one end of which is fixedly connected with the cross beam 1, and the other end of which is pivoted with the axle box 33.

As shown in fig. 9 and 10, in addition to the above technical solutions, a positioning tie rod 4 may be connected between the cross beam 1 and the axle box 33 to position the wheel pair.

The axle box 33 is further provided with a second connecting portion 332 on the outer wall thereof, and the vertical height of the second connecting portion 332 is lower than the axis of the axle 31, which corresponds to the second connecting portion 332 located below the axis of the axle box 33. One end of the positioning pull rod 4 is connected to the cross beam 1, and the other end is connected to the second connecting portion 332.

the axle housing 33 has a cylindrical main body, and the first and second coupling portions 331 and 332 are located in a semicircular plane facing the frame.

in this embodiment, two ends of the positioning rod 4 are pivotally connected to the cross beam 1 and the axle box 33, and specifically, two ends of the positioning rod 4 are provided with a second pivot 41 and a third pivot 42, respectively. Correspondingly, a tie rod connection 11 is provided on the cross beam 1, a second pivot hole 111 is provided on the tie rod connection 11, and a second pivot 41 can be fitted into the second pivot hole 111 to enable the positioning tie rod 4 to rotate relative to the cross beam 1. A third pivot hole 3321 is provided on the second connecting portion 332 of the axle box 33, and a third pivot 42 may be fitted into the third pivot hole 3321 to allow the tie rod 4 to rotate with respect to the axle box 33.

In addition to the above, the positioning rod 4 may be provided with a pivot hole, and a pivot may be provided in the cross beam 1 or the axle box 33, so that the positioning rod 4 and the cross beam 1 or the axle box 33 may be pivotally connected.

the axle box 33, the connecting beam 2 and the positioning pull rod 4 form a triangular connecting structure, so that the stability is good. Moreover, when the weight of the vehicle body is loaded on the cross beam 1, the cross beam 1 drives the axle boxes 33 to rotate (in fig. 10, the axle boxes 33 rotate clockwise) through the connecting beam 2, when the axle boxes rotate to a certain angle, the positioning pull rods 4 limit the axle boxes 33, the axle boxes 33 are limited from continuing to rotate, and then the wheel set can be restrained from shaking relative to the cross beam 1, and particularly the critical speed when the snake-shaped motion occurs can be controlled.

further, the connecting beam 2 has a vertical height at the first end lower than that at the second end. The pull rod connecting part 11 is arranged at the joint of the cross beam 1 and the connecting beam 2 and is positioned on the top surface of the cross beam 1. The positioning rod 4 is provided with a relief through hole 43 through which the connection beam 2 passes, and the connection beam 2 passes upward through the relief through hole 43 and then is connected to the first connection portion 331 at the upper portion of the axle box 33.

the positioning pull rod 4 is of an arched structure which is arched upwards as a whole and has higher strength.

The whole framework including the cross beam 1 and the connecting beam 2 can be made of carbon fiber materials, so that the flexibility of the whole framework is improved, and the transmission of vibration between wheel rails to a vehicle body is attenuated.

In the mode in which the axle boxes 33 are disposed outside the wheels 32, only the positions at which the connecting beam 2 and the tie rods 4 are connected to the cross beam 1 need be changed, which corresponds to the positions at which the connecting beam 2 and the tie rod connecting portions 11 in fig. 8 are moved to both ends of the cross beam 1 by the corresponding distances, so that the axle boxes 33 are externally disposed.

The primary cushion ring 34 serves as a primary suspension and can cushion vibrations of the wheel rail. Fig. 11 is an exploded view of a bogie according to an embodiment of the present application. As shown in fig. 11, the secondary suspension includes an air spring 7 provided on the cross member 1, and the air spring 7 is connected to the vehicle body above the vehicle body, and functions to support the vehicle body and reduce vibration transmitted to the vehicle body.

as shown in fig. 8, two secondary mounting seats 15 for mounting the air springs 7 are symmetrically arranged on the cross beam 1, and two air springs 7 are respectively arranged on the two secondary mounting seats 15.

In the bogie, the vertical load transfer path of the vehicle body is as follows: the vehicle comprises a vehicle body, air springs 7, a cross beam 1, a connecting beam 2, axle boxes 33, a series of buffer rings 34, bearings 35, axles 31, wheels 32 and rails. The vibration of the wheel rail is transmitted in the opposite direction, so that the vibration of the vehicle body can be reduced, and the riding comfort is improved.

In addition, as shown in fig. 1, 8, 9 and 10, the beam 1 is provided with a traction groove 14 in the middle for accommodating the traction device 6. Fig. 12 is an exploded view of a draft gear according to an embodiment of the present application. As shown in fig. 12, the traction device 6 includes: a center pin 61, a traction rubber stack 62 and a pressure plate 63. The traction rubber pile 62 is fixed between two pressing plates 63 and is fixed together with the pressing plates 63. The traction rubber pile 62 is centrally provided with a receiving hole 621 for receiving the center pin 61, the bottom end of the center pin 61 is inserted into the receiving hole 621, and the top end of the center pin 61 is attached to the vehicle body.

The traction device is used for transmitting traction force and braking force to the vehicle body. Longitudinal forces during vehicle operation are transmitted by longitudinal deformation of the traction rubber piles 62, lateral forces are transmitted by lateral deformation of the traction rubber piles 62, and gyroscopic damping during vehicle operation is provided by deflection compression of the traction rubber piles 62. The traction device provided by the embodiment has a simpler structure and higher reliability.

As shown in fig. 2 and 3, a brake disk 37 may be provided on the axle 31. As shown in fig. 8 to 11, a brake hanger 12 is provided on the cross beam 1, the brake hanger 12 is used for mounting the brake caliper 5, and the brake caliper 5 clamps the brake disc 37 in a braking state to perform braking.

Two brake discs 37 are symmetrically arranged on one axle 31, and four brake hanging seats 12 are correspondingly arranged on the cross beam 1 and are respectively connected with one brake clamp 5.

the bogie provided above may be used as a non-powered bogie.

for a power bogie, a motor hanger may be provided on the cross beam 1 instead of the brake hanger 12 described above. The motor hanging seat is used for assembling the driving motor. The driving motor is connected with the axle 31 through a gear box and is used for driving the axle 31 to rotate.

The present embodiments also provide an implementation of a power truck,

Fig. 13 is a schematic structural diagram of a bogie provided with a driving motor according to a first embodiment of the present disclosure, fig. 14 is an exploded view of the driving motor and a wheel set according to the first embodiment of the present disclosure, and fig. 15 is a schematic diagram of an assembly of the driving motor and the wheel set according to the first embodiment of the present disclosure. Fig. 15 is a schematic diagram, fig. 15 is only used for illustrating the assembly manner of the driving motor and the wheel set, and other components which are not directly connected with the driving motor are all schematically illustrated.

As shown in fig. 13 to 15, the axle 31 is provided with the driving motor 8, and the driving motor 8 is a direct drive motor and directly drives the axle 31 to rotate without using a gear box. Specifically, the drive motor includes: motor housing 81, stator 82 and rotor 83.

Wherein, be equipped with the motor cavity who is used for holding stator 82 and rotor 83 in the motor housing 81, the axial both ends of motor housing 81 respectively are equipped with the trompil with motor cavity intercommunication. The axle 31 passes through the opening at one end of the motor housing 81 and passes through the opening at the other end, which is equivalent to the motor housing 81 being sleeved on the axle 31.

the stator 82 is fixed to the inner wall of the motor housing 81. The rotor 83 is located in the middle of the stator 82, and the rotor 83 is connected to the axle 31 to rotate in synchronization with the axle 31. Specifically, the rotor 83 may be interference fit with the axle 31.

A connecting seat 811 for connecting with a bogie frame is arranged on the outer wall of the motor housing 81, and the connecting seat 811 is connected with a framework, in particular with the cross beam 1, through a connecting rod 84. Set up motor connecting seat 13 on crossbeam 1, the one end of connecting rod 84 is articulated with motor connecting seat 13, and the other end is articulated with connecting seat 811 for motor connecting seat 13 keeps relatively fixed with crossbeam 1 relative position on longitudinal direction. During the running process of the vehicle, the vibration of the wheels 32 can drive the driving motor 8 to generate a small amount of displacement in the vertical direction, and the displacement can be adjusted through the connecting rods 84 respectively hinged with the motor shell 81 and the cross beam 1, so that the deformation or the fracture of the connecting rods 84 is avoided.

A bearing is arranged between the motor housing 81 and the axle 31, so that the motor housing 81 and the stator 82 are fixed, and the rotor 83 drives the axle 31 to rotate.

in the case where the axle boxes 33 are disposed outside the wheels 31, one bearing is disposed at each of the two axial ends of the motor housing 81, and the inner ring of the bearing may be in interference fit with the axle 31 while the outer ring of the bearing is in clearance fit with the motor housing 81.

In the case where the axle boxes 33 are provided inside the wheels 31, one bearing is provided at each of the two axial ends of the motor housing 81, and the inner ring of the bearing may be in interference fit with the axle 31 while the outer ring of the bearing is in clearance fit with the motor housing 81. Alternatively, the configuration shown in fig. 15 of the present embodiment may be adopted: the motor housing 81 may be connected to the axle housing 33. For example: the motor housing 81 may be of unitary construction with the axle housing 33. Alternatively, both axial ends of the motor housing 81 are inserted between the bearing 35 and a series of cushion rings 34. The bearing 35 is shared by the drive motor 8 and the axle box 33, so that the number of the bearings 35 is reduced, and the weight of the wheel pair is favorably reduced. Meanwhile, a series of buffer rings 34 are disposed outside the motor housing 81 without affecting the gap between the motor stator 82 and the rotor 83. Meanwhile, the transmission of the wheel rail vibration to the framework can be slowed down.

the output rotating speed of the driving motor 8 is adapted to the rotating speed of the axle 31, a gear box is not needed, the weight of the bogie can be reduced, the self weight of the railway vehicle body can be reduced, and the driving efficiency is improved.

The driving motor 8 is used for directly driving the axle 31 to rotate, and is connected with the cross beam 1 through the axle box 33, and the motor housing 81 is connected with the cross beam 1 to transmit traction force so as to drive the railway vehicle to run. During the running of the railway vehicle, the axle 31 can be braked by controlling the drive motor 8 to rotate in reverse.

Example two

the present embodiment provides a bogie comprising a wheel set as provided above.

In the wheel pair provided by the embodiment, wheels and axle boxes positioned on the inner sides of the wheels are symmetrically arranged on an axle, and the axle boxes are connected with the axle through bearings; a series of buffer rings are arranged between the bearing and the axle box and used for buffering the vibration between the bearing and the axle box, so that the vibration of the wheel is reduced and transmitted to the axle box, and the vibration transmitted to the vehicle body through the framework is also reduced.

The embodiment also provides a railway vehicle which comprises the bogie and has the same technical effects as the bogie.

In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be considered as limiting the present application.

furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically connected, electrically connected or can communicate with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. a wheel-pair, characterized in that it comprises:

an axle;

Wheels symmetrically disposed on the axle;

The axle box is connected with the axle through a bearing;

A series of buffer rings arranged between the bearing and the axle box; the primary buffer ring includes:

An outer ring;

an intermediate ring located between the outer ring and the inner ring.

2. wheel pair according to claim 1, characterized in that the intermediate ring is a rubber ring.

3. Wheel set according to claim 2, characterized in that the outer ring is a metal ring; the inner ring is a metal ring; the middle ring is connected with the inner ring and the outer ring through a vulcanization process.

4. wheel pair according to claim 1 or 2, characterized in that the inner ring is clearance fitted with the bearing and the outer ring is interference fitted with the axlebox.

5. Wheel-pair according to claim 1, characterized in that the axle is a hollow shaft;

The wheel pair further comprises:

A shaft end cover; is connected to the end of the axle.

6. The wheel-set according to claim 1, characterized in that said wheel is an interference fit with the axle.

7. wheel pair according to claim 1, characterized in that it further comprises:

and a brake disc disposed on the axle.

8. a bogie, comprising: wheel pair according to any of claims 1-7.

9. A rail vehicle, comprising: a bogie as claimed in claim 8.